Internal-combustion engine ported sealing-ring positioning means



W. KASTEN INTERNAL-COMBUSTION E INE P0 D SEALING-RING PUSITI NG ME SFiled Feb. 18, 1948 Dec. l2, 1950 JNVENzoR. Mmmm Patented Dec. 12, i1950 INTERNALFGOMBUSTION ENGINE PQR'EED SEALING-RING POSITIONING MEANSWalter Kasten, Franklin, Mich., assigner `toSkinner Motors, Inc.(Delaware), Detroit, Mich., a

corporation cf Delaware Application February 18, 1948, Serial No. 9,184

(Cl. 12S- 75) 1 Claim. 1 The current invention relates to means forlocking the known type of ported sealing-rings used in the well-knownslide-valve type of internalcombustion motors employing a pair oftransversely curved reciprocatory inlet and discharge valves slidinglongitudinally between inner and outer cylinders of the motor.

Heretofore, several different devices have been used and suggested forthis purpose but all of them have embodied some undesirable:characteristics or defects, one of which has been the slotting of theinner surface of the cylinder in which the sealing-ring is mounted.

The purpose of the present invention is to pro vide a suitable structurewhich will avoid the necessity for such slotting, which is efficient inservice, which consists of few parts easily manufactured and atrelatively small cost, which will have comparatively long life and whichis unlikely to -be injured or damaged in the performance of its usualservices.

The manner of attainment of these and other desirable aims and objectswill be understood from a consideration of the structure and mode ofoperation of a present preferred embodiment of the invention in physicalform illustrated in the accompanying drawing, constituting part of thisspecification, and in the views of which drawing like numerals have beenemployed t desig nate the same elements or parts, this structure beingdescribed in detail hereinafter.

In this drawing, in which several parts of the engine are notillustrated because not required to comprehend the current invention-Figure 1 is a section through the motor longitudinally of one cylinderon line I-I of Figure 2;

Figure 2 is a cross-section on line 2 2 of Figure 1 with the portedsealing-ring in operative locked position; and

Figure 3 is a partial section similar to that portrayed in Figure 2showing the sealing-ring being introduced into place in the cylinder.

Referring to such drawing, it will be noted that the suitably cooledengine block II has the usual outer cylinder formed with an inlet oradmission port I2 and an exhaust or discharge port I3, such outercylinder housing the usual, appropriately supported, inner cylinder I4bearing on its top the customary, resilient, longitudinally split,ported sealing-ring I5 with its normally overlapping lends I8, I9bearing on one another, as shown in 4Figure 2.

It will, of course, be understood that the pair of ordinary, ported,semi-circular, inlet and exhaust valves 3l and 32 are reciprocatedbetween the two cylinders by means not illustrated.

This sealing-ring I5, as will be readily comprehended, must be held inposition against turning angularly on its axis to maintain its duplexin1et-ports I6, I6 in registration with its companion cylinderinlet-port I2 and its single discharge-port Il in alignment with thecylinder exhaust-port I3.

Secured in any approved manner, as by screwing it into a threaded holein the sealing-ring, is an outstanding, cylindrical stud 2I normallyoccupying the otherwise open, inner end portion of a cylindrical passage22 drilled through the side-wall of the cylinder II in register with thering I5, the outer end of such passage 22 being closed by a screw 23 orby any other suitable means. Inasmuch as passage 22 is in a side wall ofthe cylinder II it is in an outside wall of the engine block, and theouter end of the passage opens eXteriorly of the block where it isreadily accessible for insertion of a tool such as a screw driver or thelike that can be used to push the stud 2| out of the passage todisengage the rin-g I 5 from the cylinder when it is desired to removethe ring from the cylinder.

To mount sealing-ring I5 in place in cylinder II the end of the ringnearest the stud 2|, that is the end having the inner overlapped portionI9, is pressed or forced inwardly out of place, as presented in Figure3, to bring the stud 2l into register with the cavity 22 and with thelong gap between the adjacent edges of the two valves, the ring beingthen permitted to expand normally and in so doing inserting the stud 2 Ithrough the valve gap into the inner end of cavity 22, whereupon theports of the sealing-ring register and are maintained in such relationwith the corresponding cylinder-ports, as depicted in Figure 2.

Whereas, certain details of structure have been illustrated anddescribed in this application, those acquainted with this art willreadily understand that reasonable modifications therein may be resortedto without departure from the heart and essence of the invention andwithout the loss or sacrifice of any of its material benets andadvantages.

I claim:

In a slide-valve internal-combustion engine including an engine blockhaving a cylinder formed with inlet and exhaust ports, a sealing ring inand spaced from the wall of the cylinder, said ring having split innerand outer overlapping ends and openings in register with said inlet andexhaust ports, a pair of reciprocable slide valves interposed betweenthe wall of the cylinder and said sealing ring for controlling saidinlet and exhaust ports, a stud on the ring adjacent the inneroverlapping end thereof for preventing the ring fromY turning angularlyin the cylinder, the improvement comprising a through passage in anoutside wall of the engine block extending from the cylinder betweenadjacent longitudinal edges of the slide valves and receiving said stud,and a removable plug in and sealing the outer end of the passage,whereby said stud interengages with the passage to hold the ringangularly position within the cylinder and whereby removal of the plugpermits ready access to be had to the stud from exteriorly of the blockto disengage the overlapping ends of the ring for removal thereof fromthe cylinder.

WAL'IER KASTEN.

REFERENCES CITED UNITED STATES PATENTS Number Name Date 1,456,708 OsbornMay 29, 1923 1,800,479 Skinner 1 Apr. 14, 1931 1,830,137 Skinner Nov. 3,1931 1,871,250 Walrath Aug. 9, 1932 1,872,516 Skinner Aug. 16, 1932

